sapphire optics
BK7 Windows



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Custom Optical Component >> Optical Windows >> BK7 Windows
  BK7 Windows
  A borosilicate crown optical glass, BK7 offers excellent physical and chemical properties for applications in visible and near IR. Due to its high homogeneity, low bubble, inclusion content, and excellent transmittance and low absorption in the entire visible wavelength range, BK7 is ideal material for optical windows used in laser, optical system, optical communication.
UltiTech has diverse experience of manufacturing custom-made optical windows, in a wide variety of material, including sapphire windows and BK7 windows.
UltiTech offers circular, rectangular and custom shape BK7 windows with thickness from 1 mm to 50 mm. High quality single-layer or multip-layer AR, HR, PR coatings are available upon request.
BK7 optical window
  Standard Specifications of BK7 Windows
  • Diameter Tolerance: +0.0, -0.1mm
  • Thickness Tolerance: ±0.02mm
  • Clear Aperture : >85%
  • Surface Accuracy: λ/4 @ 633nm
  • Surface Quality S/D: 20/10
  • Parallelism: <3 Arc minutes
  • Bevel: <0.25mm X 45°
  • Coating: Available upon request
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Keywords: Sapphire Windows, Sapphire Lens, Sapphire Light Guides, Sapphire Balls, Sapphire Rods, Sapphire Prisms, Jewel Bearings, Sapphire Tube
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